Im not sure but it could be 4 (H)
H2 + O -> H2O
I'm pretty sure that's the answer, just tell me if I'm wrong.
The Earth holds livings things and even the layer has more complex layers in it (Also it's not white) And of course there are no oceans
Answer:
OOFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
Explanation:
IM in 7th dont ask me bro